The I-T Department will look into tax deducted at source and benami deals, if any, by Satyam, he said.

He, however, declined to give a timeline for the completion of the probe, saying, "The duration cannot be fixed, but we will try to hasten up the process." Already, the Andhra Pradesh police, market regulator SEBI and the Serious Fraud Investigation Office are investigating the fraud disclosed by Satyam founder Ramalinga Raju on January 7.

The SFIO has been given three months to complete its probe, although the investigating team has had no luck accessing Raju and others for interrogation.

Raju, his brother Rama Raju, the company's former CFO Vadlamani Srinivas and two representatives of the company's auditors are in judicial custody.